A Numerical and Experimental Study on an Interconnected Metamaterial for Flexural Vibration Control Based on Modal Strain Energy

Applied Sciences

Onyu Jeon¹  Semyung Wang¹  Hyun-Guk Kim¹ 

[1] School of Mechanical Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea;

关键词: interconnected metamaterial;    stopband;    3D printing;    vibration reduction;   

DOI  :  10.3390/app11104530

来源: DOAJ

【 摘 要 】

In this study, an interconnected metamaterial was proposed to suppress flexural vibration. The interconnected metamaterial can improve the manufacturing and installation processes in terms of convenience because it can be fabricated in the form of a modular multi-celled structure with a single-phase material. To evaluate the vibration reduction performance of the metamaterial, stopband analysis was performed, as it solves an iterative eigenvalue problem for the wave vector domain. In order to identify the Bloch mode that contributes to flexural vibration, a concept to extract the Bloch mode based on the modal strain energy was proposed. The vibration-reduction performance of the interconnected metamaterial was numerically verified by using a frequency-response analysis of the multi-celled structure. The interconnected metamaterial proposed in this study was fabricated by using a 3D printer. Finally, the vibration-reduction performance of the multi-celled structure was experimentally verified by using impact testing.

【 授权许可】

Unknown